New Grower Help please diagnosing this yellowing

[turtle360]

Always have a few lower large yellowing fan leaves. This more widespread yellowing is last couple days. Would like to arrest it.

Coincidentally did a flush with Clearex 2 days ago. Gave them more water than they've ever had. Supposed to be good for them?

It's day 45 of a 2 month grow, so I could be approaching lowering nutes. But do they need nutes?View attachment 355734View attachment 355728View attachment 355731View attachment 355732

 

[hiking high]

Can u post a pic?

 

[blue]

Hi Turtle

Those buds are looking great!
I'd keep giving them nutes until the white hairs have mostly turned orange and you're happy with the trichomes.
Then give them a 10 -14 day cleanse with just water.

Looking verrrry tasty though!!
Good work!

Blue ^_^

"kudos"

 

[Muddy]

When you flush the last gallon should always contain a mild nutrient solution as flushing leaches out all the nutrients from the soil. Did you add some to the last gallon? Also, did you pH adjust the flush and check the run off pH? If so, what was it reading?

 

[turtle360]

When you flush the last gallon should always contain a mild nutrient solution as flushing leaches out all the nutrients from the soil. Did you add some to the last gallon? Also, did you pH adjust the flush and check the run off pH? If so, what was it reading?

I tested the soil ph 2 ways before flush. Runoff water 5.7. Using a test solution 6.5.
PPM of runoff water after flush (if that's a valid number?) was 220, pretty low. Plant can react in 2 days to lack of nutes?

I did not finish with nutrient solution. Next watering should give NPK in equal parts? <ight need everything.

- - - Updated - - -

Can u post a pic?

are there not 3?

 

[Muddy]

Let me make sure I'm understanding you correctly. You flushed with 6.5 water and your run off is 5.7?

 

[turtle360]

Let me make sure I'm understanding you correctly. You flushed with 6.5 water and your run off is 5.7?

I always give ph adjusted water either side 6.5, 6.3-6.8. I measured water runoff at 5.7. I flushed with solution adj about 6.7 but didn't check ph of that runoff. I did check the PPM.

I was told by Fox Farm and Gen Hydroponics the runoff ph is not a valid number. The test solution mixed with a soil sample resulted in a color that matched most closely with 6.5. I decided I would preclude ph problem as cause of purpling. In fact I think it may be normal purple for the strain. Now I have the yellowing which is more evident. Normal aging? Nitrogen deficiency from flushing?

 

[late]

I don't do hydro, so I can't talk about that. But the plant looks healthy, what I do in that
situation is trim off the dead branches. Where that is at, about one a week for a while. Of course, if there is a nute problem and you fix it, and they stop
dying, you don't need to trim.

If you have some seaweed nutes, I'd give it some of that. You can get some at Lowes
or any garden store. If you are using strong hydro nutes, I don't understand why the leaves
wouldn't be greener. I suspect Muddy is headed in the right direction. He's also real good at this
sort of thing...

 

[turtle360]

Hi Turtle

Those buds are looking great!
I'd keep giving them nutes until the white hairs have mostly turned orange and you're happy with the trichomes.
Then give them a 10 -14 day cleanse with just water.

Looking verrrry tasty though!!
Good work!

Blue ^_^

"kudos"

In that case aren't they ready for harvest?

 

[GoAuto6]

You still have 35 to 40 days left, looks to me like a nutrient lock out due to PH.....If you check out the chart at 5.7 in soil you'v locked out all but the last 3....

Here's a formula for figuring out soil ph..I reccamend a PH meter even better would be a probe, the ph wizard is the best thing I'v added to my grow room...
[h=2]Rough Calculation Guide:[/h] Here's some good info on ph.....
If your runoff pH is higher than your starting pH, use this equation to determine your soil pH:*
Soil pH = Runoff pH + Difference

If your runoff pH is lower than your starting pH, us this equation:
Soil pH = Runoff pH - Difference.

For example, say your the starting pH of your solution before it goes in is 6.5 and the pH of your runoff is 7.0. The difference is +0.5, so using the above equation:
Soil pH = 7.0 + 0.5*
Soil pH = 7.5

If your starting pH is 6.5 and your runoff is 6.0, your difference is -0.5 and using the above equation:
Soil pH = 6.0 - 0.5
Soil pH = 5.5

her's some more good info on PH in general
[h=1]PH - Potential Hydrogen - The Manual - Polled[/h]